Amount left over (7)
I believe the answer is:
surplus
<span class="explanation-format__ClueExplanation">This clue is a triple definition!<br/ ><br/ >'<span class="explanation-format__original">amount</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(surplus is a kind of amount)</span><br/ ><br/ >'<span class="explanation-format__original">left</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">over</span>' is the third definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for surplus that I've seen before include "Superabundance" , "Surfeit" , "Amount left over" , "a bit over the top" , "balance" .)